Disturbed, often degraded open ground. S Fujian (Jinmen), Shandong (Qingdao) [native to Antilles and North and South America; adventive in N Africa, Japan, Korea, and Madagascar].

Diodia teres has not been widely reported previously from Asia, but it is known from Japan (Honshu, 18 Oct 1995, S. Tsuagaru & G. Murata 22898, MO!) at a similar latitude to its occurrence in China and probably should be expected elsewhere.